Question: What is the {scientific area} of {correspondence at} of {Emil Baumgartel}?
Paraphrase: What is the {logical range} of {correspondence at} of {Emil Baumgartel}?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q1335827 wdt:P485 ?X . ?X wdt:P101 ?answer}
Answer: social history, history of communism, history of anarchism